Filter



Sept. 28, 1948. T, L TER 2,450,208

FILTER I Filed May 20, 1947 Fig'. I.

' l urcutor Thomas Harold Slater mama Sept. 2a, 1948 UNITED STATESPATENT OFFICE 1 Claim. (01.210-7-164) This invention relates to afilter, and more particularly to a fllter for use in the cooling system.of anlnternal combustion engine.

The primary object of the invention is to exclude mud,- silt, scale andthe like from the small passages in the radiator of a cooling system,through which the cooling liquid. is circulated.

Another object is to facilitate the rapid removal of the filter from thecooling system for cleansing, and to render the interior of the filterreadily cleanable. The above and other objects may be attained byemploying this invention which embodies among its features a tubularbody, end walls at opposite ends of the body, an outstandingtubularnipple .on each end wall communicating with the interior of the body, 'aforaminous cylinder fixed.

at one end .to an end wall of the body and extendingtoward the oppositeend wall thereof in concentric spaced relation to the nipples, a capclosing the end of the foraminous cylinder in spaced relation to the endwall opposite that to which .the cylinder is fixed, and a pipe enteringthe ioraminous cylinder through the nipple carried by the wall towhichthe foraminous cylinder is ilxed and terminating in spaced relationto the cap. I

Other features include mounting the pipe to slide longitudinally intoand out of the nipple so that it may be withdrawn to render the interiorof the filter accessible for cleaning, and a flange extending outwardlyfrom one end of the pipe to limit the distance that the pipe may enterthe foraminous cylinder through the nipple.

In the drawings, a

Figure 1 is a fragmentary side view 01' an internal combustion engineand radiator for the cooling system thereof illustrating this improvedfilter coupled in the system,

Figure 2 is an enlarged longitudinal sectional view through the fllter,and

. Figure 3 is a transverse sectional view taken substantially along theline 2-2 of Figure 2. 1

Referring to the drawings in detail, an engine I block I is equippedwith a conventional cooling fluid dischargecoupling II to which aflexible hose i2 is coupled in a conventional manner. This hose l2normally discharges into a nipple l3 carried at the upper end of aconventional radiator ll, so that the heated cooling fluid leaving theengine block ill will be directed through the radiator l4, and cooledltobe re-circulated through the engine block Ill inthe conventional manner.The cooling fluid or liquid ordinarily contained in the cooling systemfrequently attacks the walls 01' the passages through which it flows,causing them to rust and scale, and the minute particles are carried bythe cooling liquid into the small passages of the radiator it with theresult that 5 these passages are likely to become clogged. Such cloggingof the passages of a radiator seriously impairs its. efllciency as acooling device for the liquid, and at times serious damage to the enginemay result.

In order to overcome these dimculties, I introduce into the systembetween the engine-block ill and theradiator I a filter, designatedgenerally I5. This filtercomprises a tubular body l8 spun at one end toform a dome-shaped end.

wall l1 and an outwardly extending tubular discharge nipple i8 whichaligns axially with the axis of the tubular body l6. The end of the bodyl6 opposite the end wall i1 is closed by an end wall l9 carrying anannular retaining flange which may be soldered or otherwise fixed to thetubular body. iii. A tubular nipple 2i extends outwardly from the wallIS in axial alignment with the nipple l8, and these nipples are of adiameter readily to fit within the flexible hose commonly employed tocouple the fitting II with the nipple It in the cooling system.

Soldered or otherwise fixed to the end wall i! in spaced concentricrelation to the nipple 2| and the tubular body I6 is a foraminouscylinder 22. As .illustrated in Figure 2, this cylinder extends from theinner face of the end wall l9 toward the end wall H, but terminatesshort of the end wall l1 and is provided with 'a dome-shaped cap 23forming an end closure for the foraminous cylinder. The cylinder 22 andthe cap 23 form a filter unit within the tubular body l6, and theinterstices in the foraminous cylinder 22 are of such minute diameter asto prevent particles of scale or the like carried by the cooling liquidfrom passing through the toraminous cylinder.

Entering the foraminous cylinder 22 through the nipple 2| is a pipe 24,one end of which is provided with an out-turned annular flange 25. Thispipe 24 is of a diameter snugly to fit the internal diameter of thenipple 2i so that even though the pipe may be extracted from the nipple,it will be held therein by frictional contact therewith. The pipe 20 isof a length sufllcient so that when the flange 25 abuts the outer end ofthe nipple 2!, the inner end of the pipe will be spaced from the dome 23so that liquid entering the pipe 24 will be discharged from the innerend thereof into the interior of the ioraminous cylinder 22 adjacent theend remote 1mm the wall it.

In use, the hose length 12 which normally establishes communicationbetween the fitting II and nipple I8 is severed and cut into shorterlengths l2 and I20. and the nipple 2| is entered into the hose length l2and clamped thereon by a conventional hose clamp 26. The nipple I8 isthen entered into the hose length Rd and clamped thereon by aconventional hose clamp 21. With the hose-clamps 26 and 21 properlytightened, no leakage will occur around the junction of the hoses withthe nipples. Assuming the cooling system to be filled with liquid, itwill be obvious that when the engine is set into operation the coolingliquid will flow through the discharge coupling II and into the hoselength [2 from whence it passes through the pipe 24 into the interior ofthe foraminous cylinder 22 which serves to arrest scale and like foreignmatter. The liquid continues on through the perforations in theforaminous cylinder and is discharged through the nipple l8 into thehose length |2a from whence it enters the nipple l3 and radiator H. Inthis way, any foreign matter carried from the engine block l toward theradiator will be arrested by the filter l5, and clogging of the smallpassages in the radiator will be avoided. The foreign matter willcollect within the filter between the foraminous cylinder 22 and thepipe 24, and periodically the filter may be removed from the coolingsystem and the pipe 24 extracted, thus giving access to the materialcollected with the filter which may be flushed out, as by coupling thenipple l8 to a source of water pressure and allowing the liquid to flowthrough the filter in a reverse direction. Once having been cleaned, thepipe 24 may be re-introduced into the foraminous cylinder 22 through thenipple 2i and the flange 2-5 will serve properly to space the inner endof the pipe from the cap 23.

While in the foregoing there has been shown and described the preferredembodiment of this invention, it is to be understood that minor changesin the details of construction, combination and arrangement of parts maybe resorted to without departing from the spirit and scope of theinvention as claimed.

Having described the invention. claimed as new is:

A filter adapted to be introduced in the cooling system of a liquidcooled internal combustion engine between the cooling liquid dischargeof the engine block and the radiator, comprising a tubular body, endwalls at opposite ends of the body, an outstanding .tubular nipple oneach end wall communicating with the interior of the body, a foraminouscylinder fixed at one end to an end wall of the body and extendingtowardthe opposite end wall thereof in concentric spaced relation to thenipples, a cap closing the end of the foraminous cylinder in spacedrelation to the end wall opposite that to which the cylinder is fixed, apipe slidably fitted into the nipple carried by the end wall to whichthe foraminous cylinder is fixed, said pipe being adapted to projectinto the foraminous cylinder and an outstanding annular flange on thepipe for engaging the end of the said nipple and limiting the distancethat the pipe m" enter the cylinder.

THOMAS HAROLD SLATER.

REFERENCES crrEp The following references are of record in the file ofthispatent:

UNITED STATES PATENTS Number Name Date 520,168 Postlethwaite May 22,1394 1,645,364 Weaver 001. 11, 1927 1,725,386 Anschicks Aug. 20, 1929what is

